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Cecinothofagus

Cecinothofagus is a genus of flies. Its name is derived from cecidium and Nothofagus, the name of the host plant genus. This genus differs from Paraulax by a median vertical carina that extends from the ventral margin of the clypeus, almost reaching the ventral margin of the antennal sockets; its facial strigae radiating from the lateral clypeus; the ventral part of its clypeus is straight; a lateral, sharp occipital carina is present; its last antennal flagellomere is 1.5 to 1.7 times longer than wide; longitudinal costulae running from the lateral margin of its pronotal plate to the lateral surface of its pronotum are very short or absent altogether; notauli are sinuate; no scutellar foveae are present; simple claws, sometimes carrying a short basal lobe.